While Google has shifted the typical Places layout from the 7-Pack to the blended organo-local results, these 7-Pack heatmaps and research from ionadas local still hold a lot of value. This snippet is of particular interest:
And our most surprising finding certainly still applies. The conventional wisdom has been that the map itself should be one of the greatest draws on the page. Our research found that the map actually receives very little attention. Most people hardly notice its presence at all.
Google 7-Pack Heatmaps & User Behavior Study by Mike Blumenthal